THERMOREGULATION IN PENGUINS OVERVIEW TYPICAL THERMOREGULATORY PRACTICES BLUBBERFAT

THERMOREGULATION IN PENGUINS

OVERVIEW TYPICAL THERMOREGULATORY PRACTICES • BLUBBER/FAT • FEATHERS • HUDDLING • TRIPOD

HUMERAL ARTERIAL PLEXUS • VASCULAR COUNTER-CURRENT HEAT EXCHANGE C ( CHE) • LIMITS HEAT LOSS THROUGH FLIPPER • ALLOWS FORAGING FOR DURATION IN COLD WATERS • CONDUCTION &CONVECTION HUMERAL = HUMERUS ARTERIAL = ARTERIES PLEXUS = SYSTEM OF VESSELS (THOMAS, 2010)

BREEDING SEASON • 4 MONTHS • FASTING • 20 KG BODY MASS (EMPEROR) • BROOD PATCH • CONDUCTION • TEMPERATURE SENSING NEURONS

ONTOGENY OF THERMOREGULATORY MECHANISMS • ONTOGENY = ORIGINATION / DEVELOPMENT OF AN ORGANISM • THERMAL EMANCIPATION • THERMOGENIC CAPACITY • THERMAL INSULATION (DUCHAMP, 2002) Chick Age Thermoregulatory Mechanisms Newly Hatched Regulatory thermogenesis (21% increase in heat production) Rapidly became hypothermic 2 -3 days 32% increase in resting metabolic rate 52% increase in peak metabolic rate 1 week 2 -fold rise in thermogenic capacity 2 -3 weeks 2 - fold increase in thermal insulation Reduction in resting heat production

SOURCES • HTTPS: //THENATURALHISTORIAN. COM/2012/12/28/HUDDLING-PENGUINS-HEAT-SHARING-SELFISH-BEHAVIOR/ • HTTPS: //ASKNATURE. ORG/STRATEGY/FEATHERS-PROTECT-FROM-WATER/#JP-CAROUSEL-6365 • HTTPS: //WWW. LIVESCIENCE. COM/64765 -HOW-PENGUINS-KEEP-EGGS-WARM. HTML • HTTPS: //WWW. SLIDESHARE. NETV / ANIJHAVERI/THERMOREGULATORY-ADAPTIONS-IN-PENGUINS • HTTPS: //STEEMIT. COM/SPACE/@ETCMIKE/COSMIC-ART-FOUND-IN-NEBULA • •